Water attachment for power drills



Patented Nov. 16,l 1926.

Leo-asse VASO SAM PEKOVCL', OF J'NEAU, TERRITORY OF ALASKA.

WATER ATTACHMENT FOR PO'WER DRILLS.

Application filed February 4, 1921, Serial No. 442.473. RenewedSeptember 1, 1926.

The invention relates to fluid-operated percussive drills, and itsobject is to provvide a new and improved water attachment for suchdrills arranged to supply water t the drillingl tool in the bore holewithout passing the water through the actuating members made hollow forthe purpose, as now generally constructed, thus permitting of making theworking members solid and rendering the same more durable and effective.

Another object is to permit of replacing worn out working parts by newones with: out affecting the water attachment.

"With these and other objects in View, the invention consists of certainnovel features of construction, as hereinafter shown and described andthen specifically pointed out in the claim.

A practical embodiment of the invention is represented in theaccompanying drawings forming a part of this speciiication7 in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a longitudinal central section of the improved waterattachment as applied to a power drill;

Figure 2 is a cross section of the same on the line 2 2 of Figure 1;

Figure 3 is a similar view of the same on the line 3 3 of Figure 1; and

Figure 4 is a side elevation, partly in section, of the locking devicefor holding the jaw-controlling screw rod against accidental 5 turning.

The improved water attachment for power drills is applied to a chuck orholder for holding` the drilling tool 11 provided with the usual centralwater passage 12 for supplying water to the drill hole. The drillingtool 11 is held in position in the chuck 10 by jaws 13 mounted to slidediametrically in guideways 14 arranged on the chuck 10, and the saidjaws 13 clampingly engage the op posite sides of the drilling` tool 11.The jaws 13 are moved toward and from the drilling tool by the use of ascrew rod 15 having right and left hand screw threads 16 and 17 engagingcorresponding segmental nuts 18 and 19 formed on the jaws 13. The outerend of the screw rod 15 is provided with a head 2O for the applicationof a wrench or other tool to turn the screw rod with a view to move thejaws 13 towards or from the drilling tool 11 according to the directionin which the screw rod is turned.

The screw rod 15 is also provided adjacent the head 2O with a toothedportion 21 engaged by a pawl 22 pivoted on the chuck 10 (see Figure 4),and serving to hold the screw rod against accidental turning.

Into the tapering end 23 of the water passage 12 in the drilling tool 11extends the correspondingly tapered end 24 0f a tube 25 for directingwater into the passage 12. The tube 25 is provided with a flange 27seated in a tube holder 28 held centrally in the chuck 10. The 'tube 25is provided with apertures 30 in register with openings 31 formed in thetube holder 28 and opening into radial passages 32 formed inthe chuck10. The passages 32 lead to an annular chamber 33 formed in the chuck 10and closed by a collar 35 mounted to rotate on the chuck 10 preferablyby the use of a ball P bearing 36, as plainly shown in Figure 1. Thecollar 35 is provided with an opening 37 connected with a water supplypipe 38 hav-l ing a flange 39 fastened by screws or other fasteningdevices 40 to the collar 35. The water supply pipe 38 extends through aguide 41 fastened to the machine head 45 thus holding the collar 35against rotation while the chuck 10 is intermittently rotated in theusual manner. The water supply pipe 38 is connected with a suitablewater supply whereby water under pressure passes through the pipe 38 andopening 37 into the annular water chamber 33 from which thev waterpasses by way of the passages 32, the openings 31 and apertures 30 intothe tube 25 from which the water is directed into the water passage 12topass into the drill hole at the cutting edges of the drill tool 11.

It will be noticed that by the arrangement described water iscontinually supplied to the. drilling tool wholly independently of theactuating parts of the power drill and without providing such parts withwater passages and weakening the same as heretofore practiced.

The described chuck and its appurtenances including the shank 52constitute when in place an attachment forming an addition and anextension of the usual drill at the front beyond the nose thereof. Atthe rear end of the attachment the same is formed with a socket7 60, totelescope over the front end or nose of the drilling machine head and itwill be seen that when the attachment is thus in place with the socketslipped on to the head 45, the front end of said head is effectivelyclosed against the entrance ot chips or other particles when the drillis Working overhead. In the usual drill, particles enter the front endof the head and lind their Way past the drill bit to the hammer, thehammer actuating means and other Working parts, requiring that the drillbe frequently taken apart and cleanedsometimes as often as twice a day-ndoing overhead drilling. This is obviated by my attachment whichprevents the entrance ot any particles through the Jfront end ot thedrill head 15.

Moreover, in the ordinary drill With the water attachment in the rear otthe drill bit and enteringl the usual head either directiy adjacent thei'ront end ot the hammer or at the extreme rear end of the drill body,leakage is liable to occur at some point within the drill, the leakageWater backing up Within the drill causing the drill to lose itsetiiciency and to deteriorate. The leakage of water into the drill isprevented by my attachment which supplies the Water to the extension andin a plane remote from the iront end ot the drill head.

The chuck l0 is provided with a recess 50 into which projects a head 5lformed on a shank 52 receiif'ing blows from the hammer 52. rthe head 51is engaged by a. key bolt 53 attached to the chuck 10 by a nut 54 totasten the shank 52 to the said chuck.' On removing the bolt 53 theshank 52 can be readily disconnected from the chuck 10, and in case theshank is Worn out it can be replaced by a new one Without requiringrenewal of the chuck l0 and the parts mounted thereon. rlhe head 5l otthe shank 52 is provided with a reduced threaded portion screwing` intothe tube holder 28 to hold the latter in place in the chuck l0 and totasten the tube 25 in place in its tube holder The mounting ot' theshank 52 in the body Ll5 is ot usual construction and hence furtherdescription ot the same is not deemed necessary.

Haring thus described .my invention, l claim as new and desire to secureby Letters Patent:

n combination with the cylinder of a drilling machine, a tool carryingmember having` water passaffes therein, means for detachably securingsaid member to the outer end ot the cylinder', means for rotating saidmember, means upon the outside ot the cylinder and associated with thetool carrying member to supply Water to said passages and an annularYflange extending axially trom said member over the adjacent end ot' thecylinder to provide a protector.

VJASO SAM PEKOVICH.

